I did in fact .. I read how to set up a pxe server for diskless install .. but floppy-based installation is something I can't find a clue about anywhere so far
there are those floppy51.fs , floppyB51.fs and floppyC51.fs
but I miss how to use them

Your original post in this thread is what someone who has not bothered to read the FAQ or the INSTALL.i386 document would type.

So, since you state you read the documents but still could not determine what to do, a more specific and targeted question from you might have elicited a useful response.

And, you have not been able to articulate what has confused you. So, please review the following quotes, noting my highlights, and see if you still need to ask questions. If you do, please, try to make your questions as specific as you possibly can.

Quote:

Originally Posted by FAQ

floppy50.fs (Desktop PC) supports many PCI and ISA NICs, IDE, SATA and simple SCSI adapters and some PCMCIA support. Most users will use this image if booting from a floppy

floppyB50.fs (Servers) supports many RAID controllers, and some of the less common SCSI adapters. However, support for many standard SCSI adapters and many EISA and ISA NICS has been removed.

floppyC50.fs (Laptops) supports the CardBus and PCMCIA devices found in many laptops.

Quote:

Originally Posted by FAQ

4.3.2 - Creating floppies on Unix

Precise details and device names may vary from Unix variant to Unix variant; use what is appropriate for your system.
To create a formatted floppy, use the fdformat(1) command to both format and check for bad sectors.
# fdformat /dev/rfd0c Format 1440K floppy `/dev/rfd0c'? (y/n): y Processing VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV done. If your output is like the above example, then the disk is OK. However, if you do not see ALL "V"'s then the disk is most likely bad, and you should try a new one.
To write the image file to the disk, use dd(1). An example usage of dd(1) is below:

# dd if=floppy50.fs of=/dev/rfd0c bs=32k Once the image is written, check to make sure that the copied image is the same as the original with the cmp(1) command. If the diskette is identical to the image, you will just see another prompt.

# cmp /dev/rfd0c floppy50.fs

Quote:

Originally Posted by INSTALL.i386

Bootable installation/upgrade floppy images: The three floppy images can be copied to a floppy using rawrite.exe, ntrw.exe, or `dd'...